To observe diffraction, the size of the obstacle (a) should beX/2, where X is the wavelength. (b) should be of the order of wavelength. (c) has no relation to wavelength. (d) should be much larger than the wavelength.

To observe diffraction, the size of the obstacle (a) should beX/2, w

1.	To observe diffraction, the size of the obstacle (a) should beX/2, where X is the wavelength. (b) should be of the order of wavelength. (c) has no relation to wavelength. (d) should be much larger than the wavelength.
Answer» Should be of the same ORDER as WAVELENGTH. ...

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To observe diffraction, the size of the obstacle (a) should beX/2, where X is the wavelength. (b) should be of the order of wavelength. (c) has no relation to wavelength. (d) should be much larger than the wavelength.

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